Min-soo’s fiancee suddenly admits that she is allergic to dogs. Now the guy’s best friend, the golden retriever Rooney, needs a new family. With the help of his cousin and social media, Min-soo starts looking for a new home for Rooney.

A womanizer and a cute woman (in a 10 year relationship going nowhere) on business trip are seated next to each other on a full train from Seoul to Busan. They start talking when she accepts she can’t escape him.